"/showgoggles" (translated) is there, definitively, but not "/showhelmet" (translated) - at least not in my UI.
My whole client is in my own language - including all chat commands !

Edit : Or I just haven't found it so far.

— “ Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius – and a lot of courage – to move in the opposite direction.“ (E.F.Schumacher, Economist, Source)